Resonant nonradiative energy transfer in CdSe/ZnS core/shell nanocrystal solids enhances hybrid white light emitting diodes

Date
2008
Advisor
Instructor
Source Title
Optics Express
Print ISSN
1094-4087
Electronic ISSN
Publisher
Optical Society of America
Volume
16
Issue
18
Pages
13391 - 13397
Language
English
Type
Article
Journal Title
Journal ISSN
Volume Title
Abstract

We propose and demonstrate hybrid white light emitting diodes enhanced with resonant nonradiative energy transfer in CdSe/ZnS core/shell nanocrystal solids integrated on near-UV InGaN/GaN LEDs. We observe a relative quantum efficiency enhancement of 13.2 percent for the acceptor nanocrystals in the energy gradient mixed assembly, compared to the monodisperse phase. This enhancement is attributed to the ability to recycle trapped excitons into nanocrystals using nonradiative energy transfer. We present the time-resolved photoluminescence of these nanocrystal solids to reveal the kinetics of their energy transfer and their steady-state photoluminescence to exhibit the resulting quantum efficiency enhancement.

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Other identifiers
Book Title
Keywords
Quantum-dot Solids, Semiconductor Nanocrystals, Thin-films, Generation, Well, Proximity, Emission, Bilayers
Citation
Published Version (Please cite this version)